CN101992029B - Preparation method for chitosan-sodium caseinate blend films - Google Patents
Preparation method for chitosan-sodium caseinate blend films Download PDFInfo
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- CN101992029B CN101992029B CN201010295289A CN201010295289A CN101992029B CN 101992029 B CN101992029 B CN 101992029B CN 201010295289 A CN201010295289 A CN 201010295289A CN 201010295289 A CN201010295289 A CN 201010295289A CN 101992029 B CN101992029 B CN 101992029B
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- sodium caseinate
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Abstract
The invention discloses a preparation method for chitosan-sodium caseinate blend films. In the method, chitosan and sodium caseinate are taken as film materials, and chitosan-sodium caseinate blend films with different properties can be prepared by controlling the content of the sodium caseinate. Since the sodium caseinate is introduced, the mechanical strength, water absorbing capacity and water vapor transmittance of chitosan films are obviously improved. The blend film can serve as a separation film, and also can serve as a controlled-release film and a packing film for medicines.
Description
Technical field
The present invention relates to a kind of preparation method with shitosan, Sodium Caseinate blend film.
Background technology
Sodium Caseinate (sodium casetnate is called for short EC) is called casein sodium, casein-sodium, casein sodium again, is caseic a kind of derivative.Characteristics such as Sodium Caseinate has good emulsification, thermally-stabilised, thickening, bubbles, preserves moisture, film forming are prone to be absorbed by the body.According to the GB2760-1996 regulation, casein sodium can be used for varieties of food items, and needs an amount of the use by production.Because separating from cow's milk, Sodium Caseinate makes; The whole essential amino acids that contain needed by human body; Be of high nutritive value, except having good emulsifying, thickening power, also can be used as the reinforcing agent of protein; Be widely used in aspects such as food such as protein beverage, meat products, oatmeal, milk powder, jelly and nutrient and healthcare products, especial patient food, instant food, pharmaceutic adjuvant, biological products, feed, receive the great attention of food processing enterprises in recent years day by day.
Shitosan is as the natural macromolecular material of function admirable; Its distinctive molecular structure; Possess that good bacteriostasis antibiosis property, moisture absorbability and moisture retentivity, gas differential permeability, resistance are moist, edibility, biology can separate characteristics such as degradability; Can be made into milipore filter, permeable membrane, food fresh keeping membrane etc. and be applied to numerous areas such as food, medicine, thereby make chitosan film industry have huge using value.But because the simple chitosan film deficiency on the performance has in every respect restricted its application again.Therefore there is the people shitosan to be carried out modification or adds other compositions process blend film; Thereby the performance of improvement chitosan film; Research shows: osmotic evaporation film is processed in shitosan and acetate fiber blend, and its performance is superior to chitosan film, can be used to separate 50%～95% ethanol-water solution.Shitosan also can be processed permeable membrane with polyvinyl alcohol blending, can guarantee high separation factor, has high permeation flux again.The plastics that shitosan and ethyl-para-hydroxybenzoate are processed has fresh-keeping effect preferably, can obviously suppress its increase weightless and content of cellulose.This shows,, the range of application that improves chitosan film is had great significance through the filming performance of improvement shitosan.
Summary of the invention
The object of the present invention is to provide a kind of preparation method who can be used as the blend film of diffusion barrier, release membranes and medicine wrap film.Because Sodium Caseinate molecule for want of secondary structure, its peptide chain is curling arbitrarily, form intermolecular hydrogen bonding, electrostatic attraction, hydrophobic bond etc. easily and film forming, so this blend film can be made by chitosan solution and Sodium Caseinate through blended cross linking by different proportion.
Preparation method of the present invention is following:
Under the normal temperature and pressure, the 5g shitosan is dissolved in 100ml, 1% dilute acetic acid solution, wiring solution-forming is dissolved in the 1g Sodium Caseinate in the 20ml pure water.Above-mentioned two kinds of solution are mixed by a certain percentage, make it complete blend with mechanical mixing method, with blended liquid filter, behind the vacuum deaerator on glass plate casting film-forming, 25～35 ℃ of oven dry in baking oven.Place 1.5～2.5% NaOH solution to be dipped to film above-mentioned glass plate and come off naturally, take out film, fully wash to neutrality, be fixed in again on the poly (methyl methacrylate) plate, put in the baking oven and dry, take off, promptly get blend film with distilled water.
The present invention has following advantage:
1, compare with shitosan-polyvinyl alcohol blending film, the mechanical strength of shitosan-Sodium Caseinate blend film obviously rises.
2,, improve the water repelling property of chitosan film within the specific limits with the difference of the addition of Sodium Caseinate.
3, improve the water vapour permeability performance of chitosan film.
The specific embodiment
The present invention with shitosan and Sodium Caseinate as membrane material; Mass fraction 100% according to shitosan in the blend film; 95%; 90%, 85% is prepared into the shitosan-Sodium Caseinate blend film of A, B, C, four kinds of different proportions of D, with the shitosan/Sodium Caseinate blend film of biology microscope sem observation different proportion preparation surperficial structure and form; Measure the blend film mechanical property, technical indicators such as water absorption rate, light transmittance and water vapour permeability compare.
The result shows that the introducing of Sodium Caseinate improves significantly to mechanical strength, water absorption rate, the water vapour permeability of chitosan film.Mechanical strength: A＜B＜C＜D, water absorption rate: A＞B＞C, D＞B, water vapour permeability: A＞B, therefore C＞D can prepare the shitosan-Sodium Caseinate blend film of different performance according to the demand of practical application through the content of control Sodium Caseinate.
Embodiment 1
Under the normal temperature and pressure, the 5g shitosan is dissolved in 100ml, 1% dilute acetic acid solution, wiring solution-forming is dissolved in the 1g Sodium Caseinate in the 20ml pure water.Get the above-mentioned Sodium Caseinate solution of above-mentioned chitosan solution of 90ml and 10ml and mix, make it complete blend with mechanical mixing method, with blended liquid filter, behind the vacuum deaerator on glass plate casting film-forming, 25～35 ℃ of oven dry in baking oven.Place 1.5～2.5% NaOH solution to be dipped to film above-mentioned glass plate and come off naturally, take out film, fully wash to neutrality with distilled water, be fixed on the poly (methyl methacrylate) plate again, put in the baking oven and dry, take off, promptly getting shitosan content is 90% blend film.The tensile strength that records this blend film is: 6184 * 10N/cm, and water absorption rate is: 71.9%, water vapour permeability the 1st day was: 0.034%, the 2 day be: 0.026%, the 3 day is 0.022%.
Claims (2)
1. the preparation method of shitosan-Sodium Caseinate blend film is characterized in that at normal temperatures and pressures, the 5g shitosan is dissolved in 100ml, 1% dilute acetic acid solution wiring solution-forming; The 1g Sodium Caseinate is dissolved in the 20ml pure water, above-mentioned two kinds of solution are mixed, make it complete blend with mechanical mixing method; With blended liquid filter, behind the vacuum deaerator on glass plate casting film-forming, 25～35 ℃ of oven dry in baking oven place 1.5～2.5% NaOH solution to be dipped to film above-mentioned glass plate and come off naturally; Take out film, fully wash to neutrality, be fixed on the poly (methyl methacrylate) plate again with distilled water; Put in the baking oven and dry, take off, promptly get blend film.
2. the preparation method of shitosan according to claim 1-Sodium Caseinate blend film is characterized in that, can be used as diffusion barrier, also can be used as the wrap film of release membranes and medicine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010295289A CN101992029B (en) | 2010-09-21 | 2010-09-21 | Preparation method for chitosan-sodium caseinate blend films |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010295289A CN101992029B (en) | 2010-09-21 | 2010-09-21 | Preparation method for chitosan-sodium caseinate blend films |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101992029A CN101992029A (en) | 2011-03-30 |
| CN101992029B true CN101992029B (en) | 2012-10-03 |
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| CN201010295289A Expired - Fee Related CN101992029B (en) | 2010-09-21 | 2010-09-21 | Preparation method for chitosan-sodium caseinate blend films |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104382844A (en) * | 2014-11-20 | 2015-03-04 | 中国医学科学院生物医学工程研究所 | PLGA-chitosan one-way slow-release membrane and preparation method and use thereof |
| CN107383896A (en) * | 2017-08-09 | 2017-11-24 | 内蒙古农业大学职业技术学院 | A kind of edible food preservative film and preparation method thereof |
| EP3937952A1 (en) * | 2019-04-18 | 2022-01-19 | National Institute of Technology Rourkela | Self-assembled nano-fibers as hemostatic agent |
| CN116272434B (en) * | 2023-05-26 | 2023-07-28 | 清华大学深圳国际研究生院 | Anti-pollution film and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6821591B2 (en) * | 2000-07-22 | 2004-11-23 | Kalle Gmbh & Co. Kg | Seamless tubular film and methods and devices for producing a seamless tubular film materials |
| CN101315202A (en) * | 2007-05-31 | 2008-12-03 | 朱林 | Self-blowing sanitation membrane especially for cooking fume exhauster and production method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6821591B2 (en) * | 2000-07-22 | 2004-11-23 | Kalle Gmbh & Co. Kg | Seamless tubular film and methods and devices for producing a seamless tubular film materials |
| CN101315202A (en) * | 2007-05-31 | 2008-12-03 | 朱林 | Self-blowing sanitation membrane especially for cooking fume exhauster and production method thereof |
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| CN101992029A (en) | 2011-03-30 |
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Granted publication date: 20121003 Termination date: 20130921 |